Micro-lensed negative-curvature fibre probe for Raman spectroscopy

Karolina Milenko, Stephanos Yerolatsitis, Astrid Aksnes, Dag Roar Hjelme, Jim Stone

Research output: Contribution to journalArticlepeer-review

Abstract

We developed a novel miniature micro-lensed fibre probe for Raman spectroscopy. The fibre probe consists of a single negative-curvature fibre (NCF) and a spliced, cleaved, micro-lensed fibre cap. Using a single NCF, we minimized the Raman background generated from the silica and maintained the diameter of the probe at less than 0.5 mm. In addition, the cap provided fibre closure by blocking the sample from entering the hollow parts of the fibre, enabling the use of the probe in in vivo applications. Moreover, the micro-lensed cap offered an improved collection efficiency (1.5-times increase) compared to a cleaved end-cap. The sensing capabilities of the micro-lensed probe were demonstrated by measuring different concentrations of glucose in aqueous solutions.

Original languageEnglish
Article number8434
JournalSensors
Volume21
Issue number24
DOIs
Publication statusPublished - 31 Dec 2021

Keywords

  • Fibre probe
  • Hollow-core fibre
  • Raman sensing

ASJC Scopus subject areas

  • Analytical Chemistry
  • Information Systems
  • Atomic and Molecular Physics, and Optics
  • Biochemistry
  • Instrumentation
  • Electrical and Electronic Engineering

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